from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse, Http404, HttpResponseRedirect
from django.urls import reverse
from django.utils import timezone
from django.views import generic

from polls.models import Reporter, Article, Question, Choice
from django.template import loader


# Create your views here.
def year_archive(request, year):
    a_list = Article.objects.filter(pub_date__year=year)
    context = {'year': year, 'article_list': a_list}
    return render(request, 'polls/year_archive.html', context)


def month_archive(request):
    pass


def article_detail(request):
    pass


def add(request):
    list = Reporter.objects.all()
    name = "xx" + str(list[len(list) - 1].id + 1);
    r = Reporter(full_name=name)
    r.save()

    a = Article(pub_date=date.today(), headline='Django is cool', content='Yeah.', reporter=r)
    a.save()

    r.delete()

    return HttpResponse(Article.objects.filter(reporter__full_name__startswith='xx1'))


def question_list(request):
    return HttpResponse(Question.objects.all())


def detail(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    try:
        question = Question.objects.get(pk=question_id)
    except Question.DoesNotExit:
        raise Http404("Question does not exist")
    return render(request, 'polls/detail.html', {'question': question})


def results(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    return render(request, 'polls/results.html', {'question': question})


def vote(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    try:
        selected_choice = question.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the question voting form.
        return render(request, 'polls/detail.html', {
            'question': question,
            'error_message': "You didn't select a choice.",
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        # Always return an HttpResponseRedirect after successfully dealing
        # with POST data. This prevents data from being posted twice if a
        # user hits the Back button.
        return HttpResponseRedirect(reverse('polls:结果', args=(question.id,)))


def index(request):
    latest_question_list = Question.objects.order_by('-pub_date')[:5]
    # template = loader.get_template("polls/index.html")
    # return HttpResponse(template.render({"latest_question_list": latest_question_list}, request))
    return render(request, "polls/index.html", {"latest_question_list": latest_question_list})


class IndexView(generic.ListView):
    template_name = 'polls/index.html'
    context_object_name = 'latest_question_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Question.objects.filter(pub_date__lte=timezone.now()).order_by('-pub_date')[:5]


class DetailView(generic.DetailView):
    model = Question
    template_name = 'polls/detail.html'

    def get_queryset(self):
        return Question.objects.filter(pub_date__lte=timezone.now())


class ResultsView(generic.DetailView):
    model = Question
    template_name = 'polls/results.html'
